Getting on like a house on fire

Choose the correct definition: 

If two people get on like a house on fire, they like each other very much and become friends very quickly.
I was worried that they wouldn't like each other, but in fact they're getting on like a house on fire.

If you get on like a house on fire, you are always in a hurry and you do not do things well.
He's getting on like a house on fire. Tell him to slow down.

If people get on like a house on fire, they start to argue angrily.
They got on like a house on fire at the meeting.